1. School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
2. Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, China University of Geosciences, Beijing 100083, China
3. Inner Mongolia Coal Exploration Unconventional Energy Co., Ltd., Hohhot 010010, China
4. Inner Mongolia Coal Exploration New Energy Development Co., Ltd., Hohhot 010010, China
5. Engineering Technology Research Center of Unconventional Gas of Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia 010010, China